Sawmill-hog.



H. G. DITTBENNER.

SAWMILL HOG.

APPLICATION FILED JULY 24, 1908.

945,496. Patented Jan.4,1910.

3 SHEETS-SHEET 1. k9

H. G. DITTBENNER.

SAWMILL HOG.

APPLICATION FILED JULY 24, 1908.

945,496, Patented Jan. 4, 1910.

3 SHEETS-SHBET 2.

H. G. DITTBENNER.

SAWMILL HOG.

APPLICATION FILED JULY 24, 1908.

945,496. Patented Jan 4, 1910.

3 SHEETS-SHEET 3.

UUUUUCID UDDUUU UIZIDDUIJCI UUDDDCID UNITED srarns treatment: '6. museums, or MINNEAPOLIS, mmvnsorA.

sAwmLmHoo.

Patented Jan. 4, 1910.

comminuted condition-and the object of my invention, is to improve the machine shown and described in Letters Patent of the United States No 777,779 issued Dec.

My invention consists generally in an implrlgved arrangement of revolving cutters or was andin an improved way of mounting and adjusting the stationary knives.

n t e accompanying drawings, formin part of this specification, Fl re 1, is an end elevatieno; a machine em ody'm my in* vention. g. 2, is a vertical sectional view of the same. Fig. 3, is a plan view. Fig. 4,; is a side, View. Fig. 5, is a sectional view illustrating the manner of mountin and adjusting the stationary knives. Figs. 6

and 7, are detailed sectional views illustrating the manner of mountin the knives in the revolving drum or cutter head.

In the drawing, 2 represents the base of the machine, and 3 a shaft having a pulley 4 secured thereon. The cutter. head is secured on said shaft and consists of two truncated cone sections 5 placed end to end on the shaft and having hubs 6. These sections when assembled as indicated inFig. 2, form the revolving cutter head of the machine with an annular V shaped recess in its periphery. Boxes 7 are mounted on the base and are adjustable by means of threaded bolts 8 which are tapped into the base and connected with said boxes by. means of lugs!) and nuts 10. By the adjustment .of the boxes on these bolts, all lateral movement of the cutter head can be taken out, ihelo ends of the boxes being set close to the In the converging faces of the-cutter head,

sections, knives are mounted, arranged preferably in pairs in staggered relation to one a; another sothat the cutting edge of one pair or gm of kniveswill be is set or out of line with the cutting edge of the preced= inggt'eup, as shown in Figs. 8 and 5. These knives, I will designate by reference nu ei' me'ral 11, each knife having a. beveled cut.

volving knives.

ting edge 12 projecting through an opening 13 in the Wall of the cutter head, the knives being arranged at an angle to the horizontal as indicated in Fig. 7, and also at an angle with respectto the axis of the so cutter head. The pairs of knives are held in place by means of plates 13 and'bolts 14 which when loosened, permit the convenient adjustment of the knives.

1A casing 15 incloses the cutter head and is provided with a hinged section 16 which permits access to the knives. The top of the casing has a feed opening 17 that is adapted to receive a spout through which the material to be crushed or ground may be delivered to-the cutter head. 7 J

On one side of the machine, is a vertical anvil plate 18 that is adapted to depend within the V- shaped recessin the cutter head and is supported at-each end on the machine casing. (See Fig. 3.)' The lower edge of this anvil plate has a series of notches 19 formed therein and below the said plate, is an anvil 20 having flaring walls'and provided with notches 21 forming seats .for 9.80 series of normally. stationary knives 22 whose upper edges enter the notches 19 in the anvil plate and are held securely by said late. These knives are horizontal and ave a longitudinal movement on the anvil 20 and are adjustable toward therevolving knives by means of a series of set screws 23 mounted in plates 24, there being one set screw for each knife. A yoke 25 is arranged above the anvil and has notches 25' in its under side, arranged to bearon a series of wedges. 26 which lock the knives securely between the anvil and the yoke 25 and are held by means of set screws 27.. The wedges are provided with notches 28 for convenlence' 9 in removing them and releasing the knives.- Any one or a group of the knives may, be adjusted independently of all the other stationary knives for the purpose of moving their cutting .edges toward or from the re 1 The arrangement of the knives is shown clearly in Figs. 6 and 7, the revolving knives being indicated as provided with beveled or wedge shaped cutting faces that are adapted to enter the notches or re .195 Icesses forme' between the cutting faces of the stationary knives, the pairs of knives entering alternate recesses and the succeed ing knives being staggered and following after to complete the cut that is begun by 119 the knives in advance. 1 The arrangement of the knives as shown in Fig. 7, illustrates the shearing action I am able to obtain by the angular arrangement of the cutter head knives and the cooperation of their cutting faces with the cutting edges of the stationary knives. The material fed to these knives will be crushed and reduced, its degree of fineness depending upon the adjustment of the knives.

The stationary knives bein interchange able and adjustable indepen ently of one another, I am able to remove one or several if desired, for the purpose of grinding them orfor repairs without the necessity of disturbing any of the other knives. The adjustment and operation of the machine is thus greatly facilitated.

I claim as my invention:

1. In a machine of the class described, a revolvin cutter head having an annular V-shape recess in its periphery, of a series of knlves mounted in the walls of said recess, each knife having a narrow cutting ed e, and the knives bein arranged in pairs si e by side, one knife'o a pair being movable lengthwise independently of the other knife of the same pair, and bolts securing said knives to said cutter head.

2. In a machine of the class described, a revolvin cutter head having an annular V-shape recess in its periphery, of a series of knives mounted in the walls of said ,recess, saidknives comprising narrow shanks having wedge-shaped. cutting edges, the cutting edge at the end of each knife being inclined with respect to the longitudinal axis of the knife, substantially as described.

3. In a machine of the class described, a revolvin cutter head having an annular recess in its periphery, of aseries of knives mounted in the walls of said recess, said knives being arranged in pairs, and each knife of a pair being adjustable lengthwise independently of the other knife of the same pair and having beveled cutting edges, and a series of stationary knives having their cutting edges arranged to form a zigzag cutting surface and cooperating with the beveled edges of said revolving knives.

4. In a machine ofthe class described, a revolving cutterhead having an annular- -V-shaped recess in its periphery, of a series of knives having narrow cutting edges mounted in the walls of said recess and adjustable lengthwise independently of one another, and stationary knives having their 7 cutting edges arranged to form a zig-zag cutting surface and cotiperating with the knives of said cutterhead for the purpose 5. In a machine of the class described, an anvil, an anvil plate supported above the same, and having a V shaped recess rovidedwith a series of notches in itse ges,

a series of knives seated on said'anvil and adapted to enter the notches in said anvil plate and' means for adjusting said knives engthwise independently of one another.

6. Ina machine, of the class described, the combination with an anvil, ofa series of knives seated thereon and receding from one another from the bottom toward the top of said anvil and means for adjusting said.

- knives lengthwise on said anvil.

7. In a machine of the class described, the combination with an anvil having a series of seats thereon, of a series of knives adapted to rest on said seats and adjustable lengthwise thereof and a series of set screws en aging said knives whereby they may be ad usted independently of one another.

8. In a machine of the class described, the combination with an anvil having seats thereon of a series of knives for said anvil, an anvil plate having notches to receive the upper ed es of-said knives, a yoke supported above sal knives, wedges interposed between said. knives and said yoke and set screws mounted in said yoke and engaging said wedges, substantially as described.

9. In a machine of the class described, the combination with a revolving cutter head and knives mounted therein, of an anvil, having seats thereon flarin from the bottom toward the top of sai anvil, a series of knives mounted on said seats and adj ustable len hwise thereon, inde endently of one anot er and means for a justing said knives.

10. In a machine of the class described, the combination with a revolvin cutter head and a series of knives mounte therein, of an anvil, a series of normally stationary knives mounted thereon, means for adjusting said anvil knives independently of one another toward or from said cutter head knives and said cutter head knives alternatin in position withsaid stationary knives, said stationary knives being arranged horizontally and said cutter head knives being mounted in said head at an angle to the axis to said cutter head, substantially as described.

11. In a machine of'the class described, stationary knives having their cutting edges arranged to formal zig-zag cutting surface, and revolving knives having beveled wedgeshaped ends to cooperate with said zig-zag cuttin surface substantiall as described.

12. n a machine of the c ass described, a series of stationary knives, the middle knife of the series "havin its cutting ed e in ad- Vance of the cuttin edges of t is other knives, andcach kni e from the middle one outwardly onboth sides having its cutting edge in the rear of the preceding knife whereby a V-shaped cutting surface is formed havin zi -zag cutting edges, and revolving kmves avmg beveled ends to enter the reoutwardly toward each side having its cutting edge in the rear of the preceding knife,

cesses' formed by the zig-zag arrangement I of said edges.

13. In a machine of the class described, stationary knives having zig-zag cutting edges, and revolving knives having beveled ends to cooperate with the zigzag arrangement of said edges, said revolving knives being arranged in pairs, and the pair of knives being staggered with respect to one another, and a cutter head wherein said revolving knives are mounted.

14. In a machine of the class described, a series of stationary knives, the middle knife of the series having its cutting edge in advance of the cutting edges of the other knives, and each knife from the mid le one and all of said knives being adjustable lengthwise, a revolving cutter head, and knives mounted in said cutter head and ha ving beveled ends arranged to sweep past the l zig-zag cutting edges formed by said stationary knives. x

15. In a machine of the class described, the combination with a revolving cutterhead and a series of knives mounted therein and having beveled cutting edges at one end, of

with the beveled ends of said revolving knives, substantially as described.

In witness whereof, I have hereunto set my hand this 11th day of July 1908.

HERMANN G. DITTBENNER.

\Vitnesses: 4

RIoHARD' PAUL, JULIAA. BYINGTON. 

